Global Optimization Very Fast Simulated Annealing Inversion for the Interpretation of Groundwater Potential

Abstract

This study examines the inversion modelling of one-dimensional Schlumberger configuration resistivity data using the Very Fast Simulated Annealing (VFSA). Detailed identification and mapping of aquifer conditions is very important for the sustainable development of groundwater resources in an area. Vertical electrical sounding (VES) and surface electrical resistivity surveys have proven very useful for studying groundwater due to their simplicity and cost effectiveness. Global optimization inversion method also provides an inversion solution that is not expected to be trapped in a local minimum solution, so that it will get results that are closer to the actual situation. The VFSA method is inspired by phenomena in metallurgy related to the formation of crystals in materials caused by thermodynamic processes. This inversion scheme was tested initially with free noise synthetic data and with noise 5%. Furthermore, the program is applied to field data that has been measured in Ambon City, Maluku, Indonesia. The results of the VFSA inversion on field data obtained four layers consisting of top soil (141.2 ± 0,61 m) with a thickness of 1.43 m, andesite breccia rock (355.90 ± 0.46 m) with a thickness of 4 m, lapilli tuff (93.40 ± 0.31 m) with 30 m thick, then the last is the coarse tuff layer (34.30 ± 0.15 m) which is estimated as an aquifer.

Investigation of Groundwater Quality using Vertical Electrical Sounding and Dar Zarrouk Parameter in Leihitu, Maluku, Indonesia

“…Non-intrusive methods that can be used to describe subsurface conditions are 1D vertical electrical sounding (VES) and 2D electrical resistivity tomography (ERT). The VES and ERT methods are methods that are widely used in mapping aquifer zones, groundwater conditions, and monitoring seawater intrusion (Bahri et al, 2022;Hasan et al, 2020). ERT can provide a two-dimensional description of subsurface conditions and has sensitivity to spatial lithology variations (Holmes et al, 2022;Porras et al, 2022).…”

Pemodelan Pola Aliran Fluida 2D di Area Panas Bumi Menggunakan Metode Elemen Hingga Pendekatan Galerkin

“…Pemetaan daerah panas bumi sangat diperlukan untuk dapat mengeksploitasi sumber dayanya dengan cara mengetahui pola aliran fluida panas. Pemetaan fluida bertujuan untuk mengetahui karakteristik aliran bawah permukaan dan keperluan eksplorasi lebih lanjut (Bahri et al, 2022). Beberapa jenis pendekatan Journal of MATHEMATICS AND APPLICATIONS numerik yang biasanya digunakan ialah metode beda hingga (finite difference method), metode elemen hingga (finite element method), metode volume hingga (finite volume method), dan metode numerik yang lainnya.…”